You really don’t want to miss your chance to sit next to Susie on the long ride to camp, so you walk by your guy friends and into the group of girls, who are climbing into the jet and choosing seats. You throw your pack in the empty seat next to Susie just before Liz, Susie’s best friend, can claim it.

Luke, your best buddy, sees you do this.“Hey, bro,” he says. “Are you trying to ditchus, or what?”

You look at the other guys. They’re expecting you to sit with them, and want some kind of explanation.